class Container{
    static of (value){
        return new Container(value)
    }
    constructor(value){
        this._value = value;
    }
    map(fn){
        return Container.of(fn(this._value));
    }
}
class MayBe{
    static of (value){
        return new MayBe(value)
    }
    constructor(value){
        this._value = value;
    }
    map(fn){
        return this.isNothing()?this: MayBe.of(fn(this._value));
    }
    isNothing(){
        return this._value === null || this._value ===undefined;
    }
}
module.exports = {Container,MayBe}